Mascara brush



1. Mascara brush

FIG. 1.1 is a bottom plan view of a mascara brush showing my new design;

FIG. 1.2 is an enlarged front elevation view thereof;

FIG. 1.3 is a perspective view thereof;

FIG. 1.4 is a side elevation view thereof; and

FIG. 1.5 is a top plan view thereof. 

CLAIM The ornamental design for a mascara brush, as shown and described. 